Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
integration series » integrating services, integration schemes, integration social
farm integration » fare integration, firms integration, care integration
side integration » trade integration, asian integration, grid integration

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply farm integration series. ) or ( supply side integration theories. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply farm integration series. ) OR ( supply side integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (( supply farm integration series. ) or ( supply side integration theories. ))*.